Lady Gaga recently explained she's submissive to boyfriend Taylor Kinney, and she apparently proved that last Friday night by publicly acting like a stripper in order to entertain him.

Page Six says that after Lady G wrapped up her performance at New York's Roseland Ballroom, she joined 1,200 revelers at newly minted hot spot BPM. With eight security guards in tow, she arrived through a back door decked out in a black leotard, fishnets and "a cape made of shredded garbage bags." After hopping onstage and "writhing" for the crowd, she rendezvoused in the VIP area with Kinney, who was sporting "a plaid shirt," presumably not made by Hefty.

"She then assumed a stripper persona and put on a show for him," relays a spy. "She was doing a serious lapdance, and they started making out."

The action supposedly got so steamy that Gaga's minders pulled a curtain around them and the other 10 people seated in their section.

"She jumped on a banquette, pulled Taylor's face into her crotch, was stroking his hair," adds the spy. Gaga also began crooning, 'Do what you want . . . with my body," a nod to her recent misguided duet with R. Kelly.

According to the paper, Gaga also spanked a female pal with a rose before she and Kinney made separate exits.

"She did this whole act for 12 people," marvels the insider.

As for the actor, he was overheard telling a fellow reveler, "I am the fire that stokes her imagination, and I'm happy to be that. We are all the fire that stoke her."

And Gaga is apparently the fire that strokes Kinney, at least when she's in lapdance mode.